摘要
建立GC-FID法测定白酒中甲醇含量的分析方法。待测样品混匀后采用DB-WAX毛细管色谱柱程序升温分离,选择氢火焰离子化检测器(FID)测定。在本试验条件下,甲醇分离效果良好,其保留时间为8. 116 min,线性方程为Y=0. 2931X-3. 0734,相关系数r值为0. 9998,回收率为100. 9%~104. 3%,RSD值为1. 3%~2. 6%,方法检出限为7. 5 mg/L。该方法快速、准确,适合白酒中甲醇含量的精确定量分析要求。
A method based on GC-FID was established to detect methanol in alcohol. After mixing sample,the methanol was separated on a DB-WAX column with temperature programming,and detected by hydrogen flame ionization detector. Methanol could be completely separated under this condition of GC-FID,its retention time was 8. 116 min,the linear equation was Y = 0. 2931 X-3. 0734,the correlation coefficient r value was 0. 9998,the recovery of the method were 100. 9 %-104. 3 %,the relative standard deviations were 1. 3 %-2. 6 %,and the detection limits of this method were 7. 5 mg/L. This method was rapid,accurate and it can be applied to detection of methanol in alcohol.
作者
潘虎
蒲继锋
代艳娜
张一帆
白军平
杨晓凤
田云
PAN Hu;PU Ji-feng;DAI Yan-na;ZHANG Yi-fan;BAI Jun-ping;YANG Xiao-feng;TIAN Yun(Institute of Agricultural Product Quality Standard and Testing Research,Tibet Academy of Agricultural and Animal Husbandry Sciences,Tibet Lhasa 850032,China;College of Bioscience and Biotechnology,Hunan Agricultural University,Hunan Changsha 410128,China;Testing Center of Sichuan Academy of Agricultural Sciences,Sichuan Chengdu 610066,China)
出处
《西藏农业科技》
2019年第4期46-47,共2页
Tibet Journal of Agricultural Sciences
基金
西藏自治区自然科学基金[XZ2019ZRG-79(Z)]
西藏自治区财政专项(XZNKY-2019-C-029)
西藏自治区科技厅重点研发与转化项目(XZ201801NB07)
湖南农业大学“双一流”建设项目(SYL201802002)。
关键词
甲醇
气相色谱法
白酒
Methanol
Gas chromatography method
Alcohol
